javascript - 如何在二维数组中检查行和列中的四个元素是否相同？

我正在尝试获取一个嵌套的forEach循环，该循环在二维数组中找到一对四个。

这是我的数组的示例:

[0, 0, 0, 0, 0],
[0, 2, 0, 0, 0],
[0, 1, 2, 0, 0],
[0, 1, 2, 2, 0],
[1, 2, 1, 1, 2],

它应该忽略0，而只能找到四个水平的，垂直的和对角的对，每个对具有“1”或“2”。

有人有什么建议吗？

最佳答案

乔纳斯(Jonas)的答案比这个答案更好，但是如果您不理解他的语法，这是一个简化且冗长的版本:

var field = [
  [0, 0, 0, 0, 0],
  [0, 2, 0, 0, 0],
  [0, 1, 2, 0, 0],
  [0, 1, 2, 2, 0],
  [1, 2, 1, 1, 2]
];

function checkVertical(field, player){
  for(i = 0; i < 5; ++i){
    if (field[0][i] === player
        && field[1][i] === player
        && field[2][i] === player
        && field[3][i] === player
    ) return true;

    if (field[1][i] === player
        && field[2][i] === player
        && field[3][i] === player
        && field[4][i] === player
    ) return true;
  }
  return false;
}

function checkHorizontal(field, player){
  for(i = 0; i < 5; ++i){
    if (field[i][0] === player
        && field[i][1] === player
        && field[i][2] === player
        && field[i][3] === player
    ) return true;

    if (field[i][1] === player
        && field[i][2] === player
        && field[i][3] === player
        && field[i][4] === player
    ) return true;
  }
  return false;
}

function checkDiagonal1(field, player){
  // exercise for the reader
  return false;
}

function checkDiagonal2(field, player){
  // exercise for the reader
  return false;
}

function isWin(field, player){
  return checkVertical(field, player)
    || checkHorizontal(field, player)
    || checkDiagonal1(field, player)
    || checkDiagonal2(field, player);

}

console.log(isWin(field, 1));